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Proceedings Paper

Measurements of the edge spread function on a realistic tissue phantom
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Paper Abstract

A simple and reliable solid tissue phantom, made of agar, intralipid and ink is described and characterized. Following a standardized preparation procedure, it is fast and easy to produce inhomogeneous structures with known optical properties and a high degree of repeatability. The proposed phantom is used to measure the edge-profile produced by abrupt variations of either the 'absorption or the scattering coefficient in a turbid slab. The samples were scanned using a system for time- resolved transmittance measurements, based on a mode-locked dye laser and an electronic chain for time-correlated single- photon counting. The photon time-distributions were then interpreted either with a solution of the diffusion equation or with a time-gating. The plots of the transport scattering coefficient, of the absorption coefficient, and of the intensity integrated over an early time-interval as a function of position can give insight into the problem of spatial resolution and the mechanism of imaging through diffusive media with different techniques.

Paper Details

Date Published: 18 August 1997
PDF: 5 pages
Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); doi: 10.1117/12.280277
Show Author Affiliations
Antonio Pifferi, CEQSE-CNR and Politecnico di Milano (Italy)
Rinaldo Cubeddu, CEQSE-CNR and Politecnico di Milano (Italy)
Paola Taroni, CEQSE-CNR and Politecnico di Milano (Italy)
Alessandro Torricelli, CEQSE-CNR and Politecnico di Milano (Italy)
Gianluca Valentini, CEQSE-CNR and Politecnico di Milano (Italy)


Published in SPIE Proceedings Vol. 2979:
Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II
Britton Chance; Robert R. Alfano, Editor(s)

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